Abstract
Subject of Research. The paper considers effect of chloride in composition of photo-thermo-refractive glass on the spectral properties of silver nanoparticles formed in ion-exchanged layers after heat treatment. Method. Glasses based on Na2O–ZnO–Al2O3–SiO2–F doped with antimony oxide Sb2O3, cerium oxide CeО2 and a variable chloride content (0–1 mol%) were synthesized for the study. Silver ions were introduced by the low-temperature Na+–Ag+ ion exchange method into the synthesized glasses. For this purpose, glass samples were immersed in a mixture of 0.1AgNO3/99.9NaNO3 (mol%) nitrates at the temperature of 320 °С for 15 minutes. After the ion exchange glasses were irradiated with ultraviolet radiation and heat-treated at the temperature of 500 °C for 3 hours to achieve the growth of silver nanoparticles. Main Results. Spectrum properties of chloride photo-thermo-refractive glasses with silver nanoparticles in ion-exchanged layers are studied. It is found that the presence of chloride in the photo-thermo-refractive glass matrix results in a long-wavelength shift of the absorption band of silver nanoparticles. That may be attributed to the growth of the mixed AgCl/NaCl shell on silver nanoparticles. The formation of silver nanoparticles in ion-exchanged layers occurs both in the irradiated and unirradiated regions of the glass. Practical Relevance. The results can be used to create Bragg gratings inside photo-thermo-refractive glass for input and output radiation (pump and signal) into the waveguide structures formed by the ion exchange method, and to create monolithic integrated optical elements on a single substrate, that is very essential for integrated optics
Highlights
The development of plasmon silver nanostructures is of great interest in the field of miniaturization and integration of optical devices, such as microresonators, plasmon waveguides, converters, and other passive elements [1, 2]
The objective of this work is to study the effect of chloride introduction into the PTR glass on the spectral properties of silver nanoparticles formed by the Na+–Ag+ ion-exchange method
In order to study the effect of chloride on the formation of silver nanoparticles in the PTR ion exchanged layers, four samples of the glass were prepared with Cl = 0, 0.5, 0.75, 1 mol%
Summary
The development of plasmon silver nanostructures is of great interest in the field of miniaturization and integration of optical devices, such as microresonators, plasmon waveguides, converters, and other passive elements [1, 2]. Silver nanoparticles can be precipitated in a glass matrix like photo-thermo-refractive glass [3], which is a promising widely used material due to its high mechanical strength and chemical resistance It can be classified as a polyfunctional material combining the properties of several monofunctional materials such as the photosensitive, photorefractive, laser, luminescent, and plasmonic ones [4]. PTR glass changes its refractive index after an exposure to the near ultraviolet (UV) radiation followed by thermal treatment at the temperatures close to the glass transition one (Tg) [6]. This change results from the precipitation of nanocrystalline AgBr-NaF phases in the fluoride PTR glasses on the silver nanoparticles and AgCl–NaCl in chloride PTR glasses. The objective of this work is to study the effect of chloride introduction into the PTR glass on the spectral properties of silver nanoparticles formed by the Na+–Ag+ ion-exchange method
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